<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" left-arrow title="黑马头条" @click-left='$router.go(-1)'></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div class="loading-wrap" v-if="isLoading">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div class="article-detail" v-else-if="articleList.title">
        <!-- 文章标题 -->
        <h1 class="article-title">这是文章标题</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image class="avatar" slot="icon" round fit="cover" :src="articleList.aut_photo" />
          <div slot="title" class="user-name">{{articleList.title}}</div>
          <div slot="label" class="publish-date">{{ articleList.pubdate|relativeTime}}</div>
          <Followed :aut_id='articleList.aut_id' v-model='articleList.is_followed' />
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div class="article-content" v-html='articleList.content' ref='refImg'>
        </div>
        <van-divider>正文结束</van-divider>

        <ArticlecComments :articleId='articleList.art_id' @click-replay='onReplyClick' :list='list' />
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div class="error-wrap" v-else-if="errStatus === 404">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div class="error-wrap" v-else>
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn" @click='loadArtclieInfo'>点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>

    <!-- 底部区域 -->
    <div class="article-bottom" v-if='articleList.title'>
      <van-button class="comment-btn" type="default" round size="small" @click='isPostShow = true'>写评论</van-button>
      <van-icon name="comment-o" color="#777" />
      <!-- v-model除了可以双向绑定还可以父子组件传值   它会解析成两部分{
        :value='要传的数据' 给子组件传一个值名字叫value
        @input='要修改的数据 = $event'  子组件又把值返回回来将该值进行修改
      } -->
      <CollectArticle v-model='articleList.is_collected' :articleId='articleList.art_id' />
      <!-- <van-icon color="#777" name="star-o" /> -->
      <LikeArticle :attitude='articleList.attitude' :articleId='articleList.art_id'
        @attitudeFn='articleList.attitude = $event' />
      <!-- <van-icon color="#777" name="good-job-o" /> -->
      <van-icon name="share" color="#777777"></van-icon>
    </div>
    <!-- /底部区域 -->
    <!-- 发布文章评论 -->
    <van-popup v-model="isPostShow" position="bottom">
      <commentPost :target='articleId' @addComment='isPostShow=false' @onList='addList' />
    </van-popup>
    <!-- /发布文章评论 -->
    <!-- 回复评论 -->
    <van-popup v-model="isShowCommentPopup" position="bottom" style="height: 100%" closeable
      close-icon-position='top-left' v-if='isShowCommentPopup'>
      <ReplayComment :comment='currentComment' />
    </van-popup>
  </div>
</template>

<script>
import ArticlecComments from '@/views/article/component/article-comment.vue'
import { ImagePreview } from 'vant'
import { getArticleById } from '@/api/article.js'
import ReplayComment from '@/components/reply-comment.vue'
import Followed from '@/components/followed.vue'
import CollectArticle from '@/components/CollectArticle.vue'
import LikeArticle from '@/components/like-article.vue'
import commentPost from '@/components/comment-post.vue'
export default {
  name: 'ArticleIndex',
  components: { Followed, CollectArticle, LikeArticle, ArticlecComments, commentPost, ReplayComment },
  props: {
    articleId: {
      type: String,
      required: true
    }
  },
  data () {
    return {
      list: [],
      articleList: {},
      errStatus: 200,
      currentComment: {},
      isLoading: false,
      isPostShow: false,
      isShowCommentPopup: false
    }
  },
  computed: {},
  watch: {},
  created () {
    this.loadArtclieInfo()
  },
  mounted () {
  },
  methods: {
    addList ($event) {
      console.log($event)
      this.list.unshift($event)
    },
    onReplyClick (e) {
      this.currentComment = e
      this.isShowCommentPopup = true
    },
    async loadArtclieInfo () {
      this.isLoading = true
      try {
        const data = await getArticleById(this.articleId)
        this.articleList = data.data.data
      } catch (err) {
        if (err.response?.status === 404) {
          this.errStatus = 404
        }
      }
      this.isLoading = false
      // setTimeout(() => {
      //   console.log(this.$refs.refImg)
      // }, 0)
      this.$nextTick(() => {
        var images = []
        this.$refs.refImg.querySelectorAll('img').forEach((i, index) => {
          images.push(i.src)
          i.onclick = () => {
            ImagePreview({
              images,
              startPosition: index
            })
          }
        })
      })
    }
  }
}
</script>

<style scoped lang="less">
.article-container {
  /deep/.van-popup__close-icon {
    color: turquoise !important;
  }
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
  /deep/.van-nav-bar__content {
    .van-nav-bar__left {
      .van-icon {
        color: #fff !important;
      }
    }
  }
}
</style>
